Again, I want to establish that I've learned a ton and really appreciate your writings. Thank you!

That looks interesting, although I would be weary of learning a layout that only works on specific keyboards, it will make it hard for you to use a laptop on the go, work in an office with a normal keyboard or any other similar situation.

Thanks for the reminder! While I can't completely ignore the main takeaway, I do find myself only rarely (read: less than 5%) engage with normal keyboards. And, AFAIU, by only adopting the exotic layout for splitting keyboards, I can keep the muscle memory for QWERTY on regular keyboards. Though, please feel free to correct me if I say something that goes against your own experiences.

which btw I strongly recommend you check out wrist and finger stretching exercises as they help a lot

Would you be so kind to share what has worked for your wrist? While there's no reason to assume that your exercises work out for me, I can at least discuss them with the physiotherapist. BTW, to be clear, I've already visited the physiotherapist a number of times and we've discussed exercises that I've eventually incorporated in my daily routine.

Lots of the changes I made (e.g. split ortholinear keyboard) were probably not needed

Question: If we focus on the split ortholinear keyboard, is only the ortholinear aspect (possibly) redundant? Or..., the split itself?